Wrench.



. & J. E. ANDERSON.

WRENCH. APPLICATION FILED MAY 21, 1914.

Patented Jim. 5,-1915.

Q-rwwwbom 1/0/11; flnde T6077 T/ h r1 E/indcrsqn JOHN ANDERSON AND JOHN ELMER ANDERSON, E PORTLAND, CONNECTICUT.

WRENCH.

To all whom it may concern Be it known that we, JOHN ANDERSON and JOHN ELMEIi ANDERSON, citizens of the United States, residing at Portland, in the county of Middlesex and State of Connecticut, have invented certain new and useful Improvements in renches; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in wrenches and more particularly to those having relatively fixed and movable jaws and a worm and worm teeth whereby the jaws may be adjusted.

The primary object of the invention is to provide a device of this character which may be inexpensively constructed and which will be efficient in operation.

A secondary object of the invention is to provide simple and efficient means for mounting the worm whereby the above ob ject is successfully carried out, this mounting eliminating numerous parts-usually employed in devices of this character.

With the above objects in view, the inven tion resides in certain novel features of construction and combination herein described and claimed and shown in the drawings wherein: a

Figure 1 is a side elevation of a wrench constructed in accordance with our invention; Fig. 2 is a similar view with the slide in section; Fig. 3 is a vertical transverse section taken along the plane of the line 33 of Fig. 2; Fig. 4 is a perspective View of the spacing plate; and Fig. 5 is a similar view of the pivot pin.

. In the accompanying drawings, we have shown our improved wrench as comprising a shank 1 which is provided, on its opposite ends, with a serrated jaw 2 and with a plain jaw 3, said jaws being preferably formed integrally with the shank for the sake of simplicity of construction.

As most clearly seen in Fig. 2, the inner edge of the shank 1 is provided with a number of transversely disposed worm teeth 1 which are formed on its inner edge, said teeth coacting with a worm :in a manner to appear. I

Movably mounted upon the shank 1 is a slide 5 which is preferably formed of a single piece of sheet metal bent upon itself throughout its longitudinal center thus Specification of Letters Patent. Y

forming a U-shaped member having its parallel sides 7 projecting beyond the worm teeth 4 and provided with rectangular openings 8 which are disposed in transverse alinement. Rigidly secured between said sides 7 preferably by means of rivets 9, is a spacing plate 10 which has its'opposite ends formed into jaws 11 and 12, the active surface of the jaw 11 being disposed at an angle to the jaw 2 with which it co-acts, while the active face of the jaw 12 is arranged in parallel relation to the jaw 3.

As most clearly seen in Fig. at, the spacing plate -10 is provided, at the central portion of its inner edge, with a transversely extending worm receiving notch 13, said notch being adapted to aline or register with the openings 8 when the parts are assembled. The opposite end walls of the notch 13 are provided with U-shaped notches 14 which are formed intermediate the ends of said end walls. It will therefore be seen that inner and outer stops 15 and 16"are' forinedat each end of the notch 13, said stops being provided for the purpose of non-rotatably mounting a pivot pin 17.

As most clearly shown in Fig. 5, the pivot pin 17 is of cylindrical formation and has its opposite ends provided with right angular notches 18, thus forming longitudinally flattenedsurfaces 19 which lie parallel to the axis of the pi1r17 and transverse flattened surfaces 20 which are disposed at right angles to the surfaces 19. When the parts are assembled, the surfaces 20 contact with the end walls of the notch 13 while Patented J an. 5, 1915. Application filed May 21, 1914. Serial No. 840,073.

the flattened surfaces 19 and the longitudii 'therefore be seen that said pin is held against rotation and against longitudinal and transverse movement, the latter being prevented by the side plates 7 which, as clearly shown in Fig. 3, contact with the opposite sides of said reduced ends of the 1n. P Revolubly mounted upon the pin 17 is a worm 21 having a square thread 22 which is adapted to engage the worm teeth 4 in the shank 1. As is common with devices of this character, the diameter of the worm 21 is preferably greater than the combined thickness of the spacing plate 10 and the side walls 7, thereby allowing the outer sura comparatively. "simple wrench and that new and novel means are employed for revolubly mounting the worm 21 and nonrotatably mounting the pivot pin 17, said means forming the gist of the present invention.

Having 'thus described our invention,

what we claim as new and desire to secure by Letters Patent is:

. A wrench comprising a relatively fixed jaw having a fiattened shank formed in-.

tegrally therewith and provided with worm teethon its inner edge, a slide U-shaped in cross section and movably mounted on said shank,.the parallel sides of said slide projecting beyond the worm teeth and having 1 I denies of this patent may be obtained 1'01- alined. rectangular openings in their projecting portions, a flattened spacing plate secured between said projecting portions and havin each,, end formed into .a jaw,

said plate av'ing a transversely extending.

worm receiving notch alining with said openings and having U-shaped transverse notches formed through the intermediate portions of its end walls, each of said U shaped notches having two parallel side Walls lying parallel to the edges of the shank, a worm in said worm receiving notch and having an external thread engaged with the worm teeth, and a cylindrical pivot pin passing loosely through said worm and projecting beyond the ends thereof, said projecting portions being provided with right angularnotohes on one side, said notches each havinga fiat longitudinal wall and a flat transverse wall, the notched ends of said pivoted pin being located in said U- shaped notches with their longitudinal flat faces contacting with one side of the wall thereof'and'with their transverse flat surfaces contacting with the parallel sides of the worm receiving notch.

In testimony whereof we have hereunto GEORGE F. CnaMnR.

five cents each, by addressing the Commissioner 0t Patents,

Washington, D. 0. 

